Dead bolt security device



FIG. 1 is a perspective view of a dead bolt security device, showing thenew design;

FIG. 2 is a front elevational view thereof, the rear elevational viewbeing a mirror image thereof;

FIG. 3 is a left-side elevational view thereof, the right-sideelevational view being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines showing a door and deadbolt in FIG. 1 depictenvironmental matter, and form no part of the claimed design.

What is claimed is the ornamental design for a dead bolt securitydevice, as shown and described.